<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
</body>
<script>
    // 先同步 后异步 
    //      先微任务【promise.then()】    后宏任务[setTimeout]
//1  6  5   
//3 1000  2
    console.log(1);
    setTimeout(() => {
        console.log(2);
    }, 0);
    let p=new Promise(function(resolve,reject){
        console.log(6);

        resolve(1000)
        reject(2000) //不执行
    })
    p.then(
        (d)=>{ 
            console.log(3)
            console.log(d)
        },
        // 不执行
        (d)=>{ 
            console.log(4)
            console.log(d)
        }
    )
    console.log(5);
//1  6  5   
//3 1000  2

</script>
</html>